17. I can’t afford a holiday this year. I’ve very little money. (as) ………………………………………………………………………………… 18. They didn’t want to be seen. They hid behind the bushes. (so as not) ………………………………………………………………………………… 19. She sorted out her clothes. She realized that she needed some new ones. (while) ………………………………………………………………………………… 20. She didn’t finish her essay. She watched a film on television. (instead of) ………………………………………………………………………………… 21. He stood on the chair. He wanted to reach the top shelf of the bookcase. (so that)

17. As I've very little money, I can't afford a holiday this years.

->as =since=because : bởi vì

18. They hid behind the bushes so as not to be seen

->so as to=in order to=to : để

-> phủ định: so as not to=in order not to=not to: không để

19. While she sorted out her clothes she realized that she needed new ones

->while: trong khi

20. She watched a film on television instead of finishing her essay 

->instead of: thay vì

21. She stood on the chair so that she could reach the top shelf of the bookcase.

-> so that + S+V

-> so that: để mà